So many $20 bills have been printed over the years that you have to go back to the 1985 series before you can find any that are worth a premium in uncirculated condition, and all the way to the 1950 series for bills that have been used.
However age isn't the only factor making a bill worth more than face value. The bill's condition and its series letter (the small letter, if any, next to the date) can also affect values. For example as of 07/2014 a 1934 $20 bill with no series letter might retail for only about $23 because so many were printed. But a 1950 bill with an E next to the date is part of a much rarer issue printed in the early 1960s and has a retail value of $50 to $65.
One Dollar
A 50 dollar bill needs to be printed before 1920 to fetch a lot of money in this market. Bills before this can be worth hundreds or even thousands more than face value.
It is worth face value unless it is uncirculated.
If it's series 1976 or later, it's worth two dollars. Anything before that begins to have collector value, but for a specific value, ask about a specific bill.
Face value only.
One Dollar
A twenty dollar bill with a star on it can be worth different amounts depending on the date. A 1914 twenty dollar bill with a star on it is worth 1000 dollars.
It's still worth one dollar.
A 50 dollar bill needs to be printed before 1920 to fetch a lot of money in this market. Bills before this can be worth hundreds or even thousands more than face value.
It is a common $100 bill in circulation and has a value of $100.
The value of a 1912 one dollar bill will vary depending on the overall condition of the bill. However, in general, a 1912 one dollar bill is only worth about ten dollars.
Since this bill is not rare and is circulated it is worth face value.
It's still worth one dollar.
Realistically, it's still worth one dollar.
$50.00
It's worth 100 dollars.
The value of a 1912 one dollar bill will vary depending on the overall condition of the bill. However, in general, a 1912 one dollar bill is only worth about ten dollars.